Can someone who is familiar with both explain to me the differences between this and Dungeon Crawler in terms of game mechanics, strategy/luck, replyability solo (I know Dungeon Crawler is exclusively solo and this isn't). I would only be playing this solo.

I am not familiar with Dungeon Crawler, but this game is really hard. I have played a few rounds with a couple different friends and have only completed a quest at most 50% of the time, and this is without getting to the final quests. The quests are also pre-set with 5 making a campaign with a decent story, and a "Delve Quest" that basically consolidates the game into 3-4 hours with no storytelling.

Also this game can be played solo, but basically you just play 2 player by yourself where you control 2 of the current 4 heroes and follow all of the 2 player rules.

First off I would suggest the same, I used this video to learn. Most of what he says is correct.

First off, WQTACG game is not really that random, it is a Campaign game where you play through a campaign, leveling up characters, collecting loot and progressing through a story, each quest taking about an hour. In Dungeon Crawler you select 3 quests and after a predefined set are done, you win, in Warhammer you have a quest card (6 included) that defines what happens at what point, what enemies you are using, rewards and special rules.

In Dungeon Crawler you use a hand of cards to attack, provide defense, and generally progress the game. In WQTACG your heroes all have 4 abilities laid out on the table. Each of these abilities can be used once, except the refresh skill that resets all of them. This means that beyond the random enemies that hop out of the enemy deck and the location deck, most things are very predictable. Also all attacks are done with dice rolls, to determine damage to both you and enemies.

Overall I have loved my time with Warhammer, but I have not tried it solo. I have been impressed primarily with the overall story telling, which makes you fell what is happening is actually important, and the overall challenge. Like I said in my last post, I have had about a 50% win streak, and even when I loose, it was a lot of fun.